CN115368727A - High-resilience polyurethane foam material and preparation method thereof - Google Patents
High-resilience polyurethane foam material and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/104—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof
- C08J9/105—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof containing sulfur
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/18—Binary blends of expanding agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The invention discloses a high-resilience polyurethane foam material and a preparation method thereof, belonging to the technical field of high-polymer foam materials; the feed comprises the following raw materials in parts by weight: 90-98.5 parts of thermoplastic polyurethane elastomer, 1-3.5 parts of adhesive and 0.5-6.5 parts of foaming composition; drying the thermoplastic polyurethane elastomer, adding the adhesive, and uniformly stirring to obtain a primary material; adding the foaming composition into the initial material, uniformly mixing, adding into an injection molding machine, and injecting into a mold for molding to obtain the high-resilience polyurethane foaming material; the core-shell structure with sodium bicarbonate as a core and epoxy resin as a shell is formed, the low decomposition temperature and the wide decomposition temperature range of the sodium bicarbonate are prevented from influencing the application range, and the filling montmorillonite is added in the preparation process and is used as an accelerant to be attached to the surface of the core-shell structure to form the foaming-nucleating integrated composite foaming composition, so that the foaming quality is improved.
Description
Technical Field
The invention belongs to the technical field of high polymer foam materials, and particularly relates to a high-resilience polyurethane foam material and a preparation method thereof.
Background
The plastic polyurethane elastomer (TPU) is a semi-crystalline polymer material prepared by combining diisocyanate, long-chain diol and short-chain diol in a certain proportion on a belt system or in a reaction extruder device. The TPU has excellent mechanical properties, excellent heat resistance and chemical medium resistance and excellent wear resistance. And products with very wide hardness can be obtained by adjusting the proportion of each raw material due to the diversity of the raw material formula.
The preparation method of the foaming TPU material at present mainly comprises the following steps: (1) Foaming by adopting a physical foaming agent, preparing foaming TPU particles by kettle pressure foaming or extrusion foaming, and processing the prepared foaming TPU particles into a product by steam molding equipment or adhesive molding equipment, wherein the method has the advantages that the prepared product has low density, good elasticity and high tensile strength; the method has the defects of complex preparation process, poor production stability of the foaming TPU particles, high cost of the obtained product, relatively limited application and the like. (2) The chemical foaming agent is adopted, and the product is prepared by injection molding or extrusion equipment, and the method has the advantages of simple preparation process, continuous production and low cost and efficiency; chemical blowing agents, such as citric acid, bicarbonate or azodicarbonamide, decompose to generate inorganic gas during injection molding to form closed cell structure in the polymer, and the product obtained by the method has coarse cell structure and easy cavity generation, and has narrow decomposition temperature interval due to low decomposition temperature of sodium bicarbonate, so that the application of the foaming material is greatly limited. Therefore, it is necessary to modify an environmentally friendly foaming agent, i.e., sodium bicarbonate, to increase the decomposition temperature range and to narrow the decomposition temperature range.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-resilience polyurethane foam material and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a high-resilience polyurethane foam material comprises the following raw materials in parts by weight: 90-98.5 parts of thermoplastic polyurethane elastomer, 1-3.5 parts of adhesive and 0.5-6.5 parts of foaming composition;
the foaming composition is prepared by the following steps:
step S1, adding sodium-based montmorillonite and 4,4 '-oxo-diphenyl sulfonyl hydrazide into a supercritical carbon dioxide reaction kettle, sealing, heating to 50 ℃, enabling carbon dioxide to reach a supercritical state under the pressure of 20MPa and the rotating speed of 100r/min, stirring and reacting for 2 hours, releasing pressure after the reaction is finished, taking out the mixture to obtain a crude product, washing, centrifuging and drying the crude product to obtain filling montmorillonite, and controlling the weight ratio of the sodium-based montmorillonite to the 4,4' -oxo-diphenyl sulfonyl hydrazide to be 20-22 g: 8-10g;
in the step S1, 4' -oxybis-benzenesulfonyl hydrazide is inserted into a sheet layer of the sodium-based montmorillonite by a supercritical carbon dioxide intercalation method, the supercritical carbon dioxide has good permeability and dissolving capacity, 4' -oxybis-benzenesulfonyl hydrazide and the montmorillonite can be fully dissolved, the 4,4' -oxybis-benzenesulfonyl hydrazide can be better inserted into an inner layer of the montmorillonite, and the sheet layer structure of the montmorillonite has gas barrier property and can prevent gas from diffusing in the material.
Step S2, adding epoxy resin into absolute ethyl alcohol, performing ultrasonic dispersion for 30min, adding sodium bicarbonate, stirring at a constant speed for 5min at room temperature, sequentially adding triethylene tetramine, sodium dodecyl benzene sulfonate and a catalyst, heating to 40-45 ℃, continuing to react for 20min, heating to 70 ℃ after the reaction is finished, performing heat preservation reaction for 5h, adding filled montmorillonite, continuing to perform heat preservation reaction for 2h, cooling to room temperature after the reaction is finished, washing with absolute ethyl alcohol and deionized water for three times respectively, and then performing vacuum drying at 60-65 ℃ to prepare a foaming composition, wherein the dosage ratio of the epoxy resin, the sodium bicarbonate and the absolute ethyl alcohol is controlled to be 1-1.2 g: 4-5 g: 100-150mL, the weight ratio of the triethylene tetramine, the sodium dodecyl benzene sulfonate and the catalyst is 1: 0.5, and the weight ratio of the epoxy resin, the triethylene tetramine and the filled montmorillonite is 10: 1: 1.2-1.5.
In the step S2, sodium bicarbonate is coated by epoxy resin, triethylene tetramine is added as a curing agent, sodium dodecyl benzene sulfonate is used as a dispersing agent to form a core-shell structure taking sodium bicarbonate as a core and epoxy resin as a shell, so that the low decomposition temperature and wide decomposition temperature range of the sodium bicarbonate are prevented, the foaming quality of the sodium bicarbonate is poor, the use range is influenced, in addition, filling montmorillonite is added in the preparation process and is used as an accelerant to be attached to the surface of the core-shell structure to form a foaming-nucleating integrated composite foaming composition, the foaming quality is improved, when the foaming agent is used, the sodium bicarbonate coated inside the foaming agent prepared by the invention starts to decompose at the temperature of 145-150 ℃, the heat resistance of the sodium bicarbonate is improved, the temperature is continuously increased to exceed 160 ℃, and then the 4,4' -oxybis benzenesulfonyl hydrazide in the montmorillonite is filled for foaming, so that the foaming amount is improved.
Further: the adhesive is mineral oil, the Shore hardness of the thermoplastic polyurethane elastomer is 40A-80D, and the melting point of the thermoplastic polyurethane elastomer is less than 180 ℃.
A preparation method of a high-resilience polyurethane foam material comprises the following steps:
firstly, drying a thermoplastic polyurethane elastomer at 75-110 ℃ until the moisture is lower than 500wtppm, then adding a bonding agent, and uniformly stirring to obtain a primary material;
secondly, adding the foaming composition into the initial material, uniformly mixing, adding into an injection molding machine, and injecting into a mold at 150-180 ℃ for molding to obtain the high-resilience polyurethane foaming material, wherein the mold temperature is 25 ℃.
The invention has the beneficial effects that:
the invention relates to a high-resilience polyurethane foaming material, which takes a thermoplastic polyurethane elastomer as a substrate, a foaming composition is added, the foaming composition coats sodium bicarbonate through epoxy resin in the preparation process, triethylene tetramine is added as a curing agent, sodium dodecyl benzene sulfonate is used as a dispersing agent, a core-shell structure taking the sodium bicarbonate as a core and the epoxy resin as a shell is formed, the low decomposition temperature and the wide decomposition temperature interval of the sodium bicarbonate are prevented, the foaming quality of the sodium bicarbonate is poor, and the application range is influenced, in addition, filling montmorillonite is added in the preparation process, and is used as an accelerating agent and attached to the surface of the core-shell structure to form a foaming-nucleating integrated composite foaming composition, the foaming quality is improved, when in use, the foaming agent prepared by the invention starts to decompose the sodium bicarbonate coated inside at the temperature of 145-150 ℃, the heat resistance of the sodium bicarbonate is improved, the decomposition temperature is matched with the melt strength of the thermoplastic polyurethane elastomer, the problem that the traditional chemical foaming method is easy to generate broken holes is solved, and the foaming amount is improved by continuously increasing the temperature to exceed 160 ℃ and then filling 4,4' -oxybis benzenesulfonylhydrazide in the montmorillonite.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The foaming composition is prepared by the following steps:
step S1, adding sodium-based montmorillonite and 4,4 '-oxo-bis-benzenesulfonyl hydrazide into a supercritical carbon dioxide reaction kettle, sealing, heating to 50 ℃, enabling carbon dioxide to reach a supercritical state under the pressure of 20MPa and the rotating speed of 100r/min, stirring and reacting for 2 hours, releasing pressure after the reaction is finished, taking out the mixture to obtain a crude product, washing, centrifuging and drying the crude product to obtain filled montmorillonite, and controlling the weight ratio of the sodium-based montmorillonite to the 4,4' -oxo-bis-benzenesulfonyl hydrazide to be 20 g: 8g;
and S2, adding epoxy resin into absolute ethyl alcohol, performing ultrasonic dispersion for 30min, adding sodium bicarbonate, stirring at a constant speed for 5min at room temperature, sequentially adding triethylenetetramine, sodium dodecyl benzene sulfonate and a catalyst, heating to 40 ℃, continuing to react for 20min, heating to 70 ℃ after the reaction is finished, performing heat preservation reaction for 5h, adding filled montmorillonite, continuing to perform heat preservation reaction for 2h, cooling to room temperature after the reaction is finished, washing with absolute ethyl alcohol and deionized water for three times respectively, and then performing vacuum drying at 60 ℃ to prepare a foaming composition, wherein the dosage ratio of the epoxy resin, the sodium bicarbonate and the absolute ethyl alcohol is controlled to be 1 g: 4 g: 100mL, the weight ratio of the triethylenetetramine, the sodium dodecyl benzene sulfonate and the catalyst is 1: 0.5, and the weight ratio of the epoxy resin, the triethylenetetramine and the filled montmorillonite is 10: 1: 1.2.
Example 2
The foaming composition is prepared by the following steps:
step S1, adding sodium-based montmorillonite and 4,4 '-oxo-bis-benzenesulfonyl hydrazide into a supercritical carbon dioxide reaction kettle, sealing, heating to 50 ℃, enabling carbon dioxide to reach a supercritical state under the pressure of 20MPa and the rotating speed of 100r/min, stirring and reacting for 2 hours, releasing pressure after the reaction is finished, taking out the mixture to obtain a crude product, washing, centrifuging and drying the crude product to obtain filled montmorillonite, and controlling the weight ratio of the sodium-based montmorillonite to the 4,4' -oxo-bis-benzenesulfonyl hydrazide to be 21 g: 9g;
s2, adding epoxy resin into absolute ethyl alcohol, performing ultrasonic dispersion for 30min, adding sodium bicarbonate, stirring at a constant speed for 5min at room temperature, sequentially adding triethylenetetramine, sodium dodecyl benzene sulfonate and a catalyst, heating to 42 ℃, continuing to react for 20min, heating to 70 ℃ after the reaction is finished, performing heat preservation reaction for 5h, adding filled montmorillonite, continuing to perform heat preservation reaction for 2h, cooling to room temperature after the reaction is finished, washing with absolute ethyl alcohol and deionized water for three times respectively, and then performing vacuum drying at 62 ℃ to prepare a foaming composition, wherein the dosage ratio of the epoxy resin, the sodium bicarbonate and the absolute ethyl alcohol is controlled to be 1.1 g: 4.5 g: 120mL, the weight ratio of the triethylenetetramine, the sodium dodecyl benzene sulfonate and the catalyst is 1: 0.5, and the weight ratio of the epoxy resin, the triethylenetetramine and the filled montmorillonite is 10: 1: 1.3.
Example 3
The foaming composition is prepared by the following steps:
step S1, adding sodium-based montmorillonite and 4,4 '-oxo-diphenyl sulfonyl hydrazine into a supercritical carbon dioxide reaction kettle, sealing, heating to 50 ℃, enabling carbon dioxide to reach a supercritical state under the pressure of 20MPa and the rotating speed of 100r/min, stirring and reacting for 2 hours, releasing pressure after the reaction is finished, taking out the mixture to obtain a crude product, washing, centrifuging and drying the crude product to obtain filled montmorillonite, and controlling the weight ratio of the sodium-based montmorillonite to the 4,4' -oxo-diphenyl sulfonyl hydrazine to be 22 g: 10g;
step S2, adding epoxy resin into absolute ethyl alcohol, performing ultrasonic dispersion for 30min, adding sodium bicarbonate, stirring at a constant speed for 5min at room temperature, sequentially adding triethylenetetramine, sodium dodecyl benzene sulfonate and a catalyst, heating to 45 ℃, continuing to react for 20min, heating to 70 ℃ after the reaction is finished, performing heat preservation reaction for 5h, adding filled montmorillonite, continuing to perform heat preservation reaction for 2h, cooling to room temperature after the reaction is finished, washing with absolute ethyl alcohol and deionized water for three times respectively, and then performing vacuum drying at 65 ℃ to prepare a foaming composition, wherein the dosage ratio of the epoxy resin, the sodium bicarbonate and the absolute ethyl alcohol is controlled to be 1.2 g: 5 g: 150mL, the weight ratio of the triethylenetetramine, the sodium dodecyl benzene sulfonate and the catalyst is 1: 0.5, and the weight ratio of the epoxy resin, the triethylenetetramine and the filled montmorillonite is 10: 1: 1.5.
Example 4
A high-resilience polyurethane foam material comprises the following raw materials in parts by weight: 90 parts of thermoplastic polyurethane elastomer, 1 part of mineral oil and 0.5 part of foaming composition;
firstly, drying a thermoplastic polyurethane elastomer at 75 ℃ until the moisture is lower than 500wtppm, then adding mineral oil, and uniformly stirring to obtain a primary material;
and secondly, adding the foaming composition into the initial material, uniformly mixing, adding into an injection molding machine, and injecting into a mold at 150 ℃ for molding to obtain the high-resilience polyurethane foaming material, wherein the mold temperature is 25 ℃.
Example 5
A high-resilience polyurethane foam material comprises the following raw materials in parts by weight: 93 parts of thermoplastic polyurethane elastomer, 2.5 parts of mineral oil and 3.5 parts of foaming composition;
firstly, drying a thermoplastic polyurethane elastomer at 100 ℃ until the moisture content is lower than 500wtppm, then adding mineral oil, and uniformly stirring to obtain a primary material;
and secondly, adding the foaming composition into the initial material, uniformly mixing, adding into an injection molding machine, and injecting into a mold at 160 ℃ for molding to obtain the high-resilience polyurethane foaming material, wherein the mold temperature is 25 ℃.
Example 6
A high-resilience polyurethane foam material comprises the following raw materials in parts by weight: 98.5 parts of thermoplastic polyurethane elastomer, 3.5 parts of mineral oil and 6.5 parts of foaming composition;
firstly, drying a thermoplastic polyurethane elastomer at 110 ℃ until the moisture content is lower than 500wtppm, then adding mineral oil, and uniformly stirring to obtain a primary material;
and secondly, adding the foaming composition into the initial material, uniformly mixing, adding into an injection molding machine, and injecting into a mold at 180 ℃ for molding to obtain the high-resilience polyurethane foaming material, wherein the mold temperature is 25 ℃.
Comparative example 1
This comparative example compared to example 4 using sodium bicarbonate instead of the foaming composition.
Comparative example 2
The comparative example is a polyurethane foam material prepared by the invention patent CN 110903454B.
As can be seen from the above table, the foamed materials prepared in examples 4 to 6 have high resilience and no cavities or depressions.
The foregoing is illustrative and explanatory only of the present invention, and it is intended that the present invention cover modifications, additions, or substitutions by those skilled in the art, without departing from the spirit of the invention or exceeding the scope of the claims.
Claims (5)
1. A high-resilience polyurethane foam material is characterized in that: the feed comprises the following raw materials in parts by weight: 90-98.5 parts of thermoplastic polyurethane elastomer, 1-3.5 parts of adhesive and 0.5-6.5 parts of foaming composition;
the foaming composition is prepared by the following steps:
step S1, adding sodium-based montmorillonite and 4,4' -oxo-diphenyl sulfonyl hydrazide into a supercritical carbon dioxide reaction kettle, sealing, heating to 50 ℃, enabling carbon dioxide to reach a supercritical state under the pressure of 20MPa and the rotating speed of 100r/min, stirring and reacting for 2 hours, releasing pressure after the reaction is finished, taking out the mixture to obtain a crude product, and washing, centrifuging and drying the crude product to obtain filled montmorillonite;
and S2, adding epoxy resin into absolute ethyl alcohol, performing ultrasonic dispersion for 30min, adding sodium bicarbonate, stirring at a constant speed for 5min at room temperature, sequentially adding triethylenetetramine, sodium dodecyl benzene sulfonate and a catalyst, heating to 40-45 ℃, continuing to react for 20min, heating to 70 ℃ after the reaction is finished, performing heat preservation reaction for 5h, adding filled montmorillonite, continuing to perform heat preservation reaction for 2h, cooling to room temperature after the reaction is finished, washing with absolute ethyl alcohol and deionized water for three times respectively, and then performing vacuum drying at 60-65 ℃ to obtain the foaming composition.
2. The high resilience polyurethane foam material according to claim 1, wherein: in the step S1, the weight ratio of sodium montmorillonite to 4,4' -oxo-diphenyl sulfonyl hydrazide is controlled to be 20-22 g: 8-10g, in the step S2, the dosage ratio of epoxy resin, sodium bicarbonate to absolute ethyl alcohol is controlled to be 1-1.2 g: 4-5 g: 100-150mL, the weight ratio of triethylene tetramine, sodium dodecyl benzene sulfonate to catalyst is 1: 0.5, and the weight ratio of epoxy resin, triethylene tetramine to filled montmorillonite is 10: 1: 1.2-1.5.
3. The high resilience polyurethane foam material according to claim 1, wherein: the adhesive is mineral oil, the Shore hardness of the thermoplastic polyurethane elastomer is 40A-80D, and the melting point of the thermoplastic polyurethane elastomer is less than 180 ℃.
4. The preparation method of the high resilience polyurethane foam material according to claim 1, wherein: the method comprises the following steps:
firstly, drying a thermoplastic polyurethane elastomer at 75-110 ℃ until the moisture is lower than 500wtppm, then adding a bonding agent, and uniformly stirring to obtain a primary material;
and secondly, adding the foaming composition into the initial material, uniformly mixing, adding into an injection molding machine, and injecting into a mold at 150-180 ℃ for molding to obtain the high-resilience polyurethane foaming material.
5. The preparation method of the high resilience polyurethane foam material according to claim 4, wherein: in the second step the mould temperature was 25 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116284977A (en) * | 2023-05-22 | 2023-06-23 | 广讯检测（广东）有限公司 | Inorganic surface modified azodicarbonamide and preparation method and application thereof |
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